Hatta Y, De La Cruz J, Murray T, Hiatt B, Jang Y,. Highly Pathogenic Avian Influenza A(H5N1) Clade 2.3.4.4b Virus Infection in Poultry Farm Workers, Washington, USA, 2024. Emerg Infect Dis. 2025 Dec
Poultry workers in Washington, USA, were infected with highly pathogenic avian influenza A(H5N1) virus and recovered. The viruses were clade 2.3.4.4b genotype D1.1, closely related to viruses causing poultry outbreaks. Continued surveillance and testing for influenza A(H5) clade 2.3.4.4b viruses remain essential for risk assessment and pandemic preparedness of zoonotic influenza viruses.
Page created: November 20, 2025
Page updated: December 23, 2025
Page reviewed: December 23, 2025
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